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+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef	_NETINET_IN_H
+
+#define	_NETINET_IN_H	1
+#include <features.h>
+
+#include <sys/socket.h>
+#include <sys/types.h>
+
+
+__BEGIN_DECLS
+
+/* Standard well-defined IP protocols.  */
+enum
+  {
+    IPPROTO_IP = 0,	 /* Dummy protocol for TCP.  */
+    IPPROTO_ICMP = 1,	 /* Internet Control Message Protocol.  */
+    IPPROTO_IGMP = 2,	 /* Internet Group Management Protocol. */
+    IPPROTO_IPIP = 4,	 /* IPIP tunnels (older KA9Q tunnels use 94).  */
+    IPPROTO_TCP = 6,	 /* Transmission Control Protocol.  */
+    IPPROTO_EGP = 8,	 /* Exterior Gateway Protocol.  */
+    IPPROTO_PUP = 12,	 /* PUP protocol.  */
+    IPPROTO_UDP = 17,	 /* User Datagram Protocol.  */
+    IPPROTO_IDP = 22,	 /* XNS IDP protocol.  */
+    IPPROTO_IPV6 = 41,   /* IPv6-in-IPv4 tunnelling.  */
+    IPPROTO_ICMPV6 = 58, /* ICMPv6.  */
+
+    IPPROTO_RAW = 255,	 /* Raw IP packets.  */
+    IPPROTO_MAX
+  };
+
+/* Standard well-known ports.  */
+enum
+  {
+    IPPORT_ECHO = 7,		/* Echo service.  */
+    IPPORT_DISCARD = 9,		/* Discard transmissions service.  */
+    IPPORT_SYSTAT = 11,		/* System status service.  */
+    IPPORT_DAYTIME = 13,	/* Time of day service.  */
+    IPPORT_NETSTAT = 15,	/* Network status service.  */
+    IPPORT_FTP = 21,		/* File Transfer Protocol.  */
+    IPPORT_TELNET = 23,		/* Telnet protocol.  */
+    IPPORT_SMTP = 25,		/* Simple Mail Transfer Protocol.  */
+    IPPORT_TIMESERVER = 37,	/* Timeserver service.  */
+    IPPORT_NAMESERVER = 42,	/* Domain Name Service.  */
+    IPPORT_WHOIS = 43,		/* Internet Whois service.  */
+    IPPORT_MTP = 57,
+
+    IPPORT_TFTP = 69,		/* Trivial File Transfer Protocol.  */
+    IPPORT_RJE = 77,
+    IPPORT_FINGER = 79,		/* Finger service.  */
+    IPPORT_TTYLINK = 87,
+    IPPORT_SUPDUP = 95,		/* SUPDUP protocol.  */
+
+
+    IPPORT_EXECSERVER = 512,	/* execd service.  */
+    IPPORT_LOGINSERVER = 513,	/* rlogind service.  */
+    IPPORT_CMDSERVER = 514,
+    IPPORT_EFSSERVER = 520,
+
+    /* UDP ports.  */
+    IPPORT_BIFFUDP = 512,
+    IPPORT_WHOSERVER = 513,
+    IPPORT_ROUTESERVER = 520,
+
+    /* Ports less than this value are reserved for privileged processes.  */
+    IPPORT_RESERVED = 1024,
+
+    /* Ports greater this value are reserved for (non-privileged) servers.  */
+    IPPORT_USERRESERVED = 5000
+  };
+
+
+/* Internet address.  */
+struct in_addr
+  {
+    unsigned int s_addr;
+  };
+
+
+/* Definitions of the bits in an Internet address integer.
+
+   On subnets, host and network parts are found according to
+   the subnet mask, not these masks.  */
+
+#define	IN_CLASSA(a)		((((unsigned) (a)) & 0x80000000) == 0)
+#define	IN_CLASSA_NET		0xff000000
+#define	IN_CLASSA_NSHIFT	24
+#define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)
+#define	IN_CLASSA_MAX		128
+
+#define	IN_CLASSB(a)		((((unsigned) (a)) & 0xc0000000) == 0x80000000)
+#define	IN_CLASSB_NET		0xffff0000
+#define	IN_CLASSB_NSHIFT	16
+#define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)
+#define	IN_CLASSB_MAX		65536
+
+#define	IN_CLASSC(a)		((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
+#define	IN_CLASSC_NET		0xffffff00
+#define	IN_CLASSC_NSHIFT	8
+#define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)
+
+#define	IN_CLASSD(a)		((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
+#define	IN_MULTICAST(a)		IN_CLASSD(a)
+
+#define	IN_EXPERIMENTAL(a)	((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
+#define	IN_BADCLASS(a)		((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
+
+/* Address to accept any incoming messages.  */
+#define	INADDR_ANY		((unsigned) 0x00000000)
+/* Address to send to all hosts.  */
+#define	INADDR_BROADCAST	((unsigned) 0xffffffff)
+/* Address indicating an error return.  */
+#define	INADDR_NONE		((unsigned) 0xffffffff)
+
+/* Network number for local host loopback.  */
+#define	IN_LOOPBACKNET	127
+/* Address to loopback in software to local host.  */
+#ifndef INADDR_LOOPBACK
+#define	INADDR_LOOPBACK	((unsigned) 0x7f000001)	/* Inet address 127.0.0.1.  */
+#endif
+
+
+/* IPv6 address */
+struct in6_addr
+  {
+    union
+      {
+	u_int8_t	u6_addr8[16];
+	u_int16_t	u6_addr16[8];
+	u_int32_t	u6_addr32[4];
+#if (~0UL) > 0xffffffff
+	u_int64_t	u6_addr64[2];
+#endif
+      } in6_u;
+#define s6_addr			in6_u.u6_addr8
+#define s6_addr16		in6_u.u6_addr16
+#define s6_addr32		in6_u.u6_addr32
+#define s6_addr64		in6_u.u6_addr64
+  };
+
+extern const struct in6_addr in6addr_any;        /* :: */
+extern const struct in6_addr in6addr_loopback;   /* ::1 */
+#define IN6ADDR_ANY_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+#define IN6ADDR_LOOPBACK_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }
+
+#define INET_ADDRSTRLEN 16
+#define INET6_ADDRSTRLEN 46
+
+/* Get the definition of the macro to define the common sockaddr members.  */
+#include <sockaddrcom.h>
+
+
+/* Structure describing an Internet socket address.  */
+struct sockaddr_in
+  {
+    __SOCKADDR_COMMON (sin_);
+    unsigned short int sin_port;	/* Port number.  */
+    struct in_addr sin_addr;		/* Internet address.  */
+
+    /* Pad to size of `struct sockaddr'.  */
+    unsigned char sin_zero[sizeof (struct sockaddr) -
+			   __SOCKADDR_COMMON_SIZE -
+			   sizeof (unsigned short int) -
+			   sizeof (struct in_addr)];
+  };
+
+/* Ditto, for IPv6.  */
+struct sockaddr_in6
+  {
+    __SOCKADDR_COMMON (sin6_);
+    u_int16_t		sin6_port;      /* Transport layer port # */
+    u_int32_t		sin6_flowinfo;  /* IPv6 flow information */
+    struct in6_addr	sin6_addr;      /* IPv6 address */
+  };
+
+/* IPv6 multicast request.  */
+struct ipv6_mreq
+  {
+    /* IPv6 multicast address of group */
+    struct in6_addr ipv6mr_multiaddr;
+
+    /* local IPv6 address of interface */
+    int		ipv6mr_ifindex;
+  };
+
+/* Get system-specific definitions.  */
+#include <netinet/inbits.h>
+
+/* Functions to convert between host and network byte order.
+
+   Please note that these functions normally take `unsigned long int' or
+   `unsigned short int' values as arguments and also return them.  But
+   this was a short-sighted decision since on different systems the types
+   may have different representations but the values are always the same.  */
+
+extern u_int32_t ntohl __P ((u_int32_t __netlong));
+extern u_int16_t ntohs __P ((u_int16_t __netshort));
+extern u_int32_t htonl __P ((u_int32_t __hostlong));
+extern u_int16_t htons __P ((u_int16_t __hostshort));
+
+#include <endian.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+/* The host byte order is the same as network byte order,
+   so these functions are all just identity.  */
+#define	ntohl(x)	(x)
+#define	ntohs(x)	(x)
+#define	htonl(x)	(x)
+#define	htons(x)	(x)
+#endif
+
+#define IN6_IS_ADDR_UNSPECIFIED(a) \
+        ((((u_int32_t *) (a))[0] == 0) && ((u_int32_t *) (a))[1] == 0) && \
+         (((u_int32_t *) (a))[2] == 0) && ((u_int32_t *) (a))[3] == 0))
+
+#define IN6_IS_ADDR_LOOPBACK(a) \
+        ((((u_int32_t *) (a))[0] == 0) && ((u_int32_t *) (a))[1] == 0) && \
+         (((u_int32_t *) (a))[2] == 0) && ((u_int32_t *) (a))[3] == htonl (1)))
+
+#define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t *) (a))[0] == 0xff)
+
+#define IN6_IS_ADDR_LINKLOCAL(a) \
+        ((((u_int32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfe800000))
+
+#define IN6_IS_ADDR_SITELOCAL(a) \
+        ((((u_int32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfec00000))
+
+#define IN6_IS_ADDR_V4MAPPED(a) \
+        ((((u_int32_t *) (a))[0] == 0) && (((u_int32_t *) (a))[1] == 0) && \
+         (((u_int32_t *) (a))[2] == htonl (0xffff)))
+
+#define IN6_IS_ADDR_V4COMPAT(a) \
+        ((((u_int32_t *) (a))[0] == 0) && (((u_int32_t *) (a))[1] == 0) && \
+         (((u_int32_t *) (a))[2] == 0) && (ntohl (((u_int32_t *) (a))[3]) > 1))
+
+
+/* Bind socket to a privileged IP port.  */
+extern int bindresvport __P ((int __sockfd, struct sockaddr_in *__sin));
+
+
+/* IPv6 packet information.  */
+struct in6_pktinfo
+  {
+    struct in6_addr ipi6_addr;    /* src/dst IPv6 address */
+    int             ipi6_ifindex; /* send/recv interface index */
+  };
+
+__END_DECLS
+
+#endif	/* netinet/in.h */